<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Demo1</title>
</head>
<body>
    <h2>欢迎访问 Demo1</h2>
    <form action="/login" method="POST">
        <div>
            <label>用户名：</label>
            <input type="text" name="username" />
        </div>
        <div>
            <label>密码：</label>
            <input type="text" name="password" />
        </div>
        <button type="submit">登录</button>
    </form>
</body>
</html>